/// <summary>Returns a geometry object that represents the union of all points whose distance from a geometry instance is less than or equal to a specified value.</summary>
/// <returns>A geometry object that represents the union of all points.</returns>
/// <param name="distance">The distance.</param>
public DbGeometry Buffer(double?distance)
{
Check.NotNull(distance, "distance");
return(_spatialProvider.Buffer(this, distance.Value));
}
